Diode

Question 1

What is a double limiter?

Answer 1

A clipper that works on positive and negative rails

Question 2

Describe a clamped capacitor circuit?

Answer 2

An ac-coupled diode with cathode to ground and a parallel load resistor. This is a DC restoring circuit.

Question 3

What are the differences of a schottky-barrier diode

Answer 3

1) current is conducted by the majority carriers thus is does not have minority carrier storage effects which makes switching faster. 2) forward drop is lower
3) SBD are moderately doped semi connector to metal. Heavily doped is an ohmic contact

Question 4

How fast does current increase in a typical silicon diode

Answer 4

Vt @ 0.5V, 60mV per decade of current

Question 5

What is diode current in reverse direction?

Answer 5

1nA. Bigger than Is because of leakage effects and increases with reverse voltage

Question 6

What is the small signal resistance of diode

Answer 6

rd=Vt/Id

Question 7

What is full wave ripple voltage

Answer 7

Vr=Vp/2fRC